To get an idea of exactly how small the worldâs smallest insect is, take out a ruler and look at those tiny lines that appear in between centimeters (make sure youâre not on the side that measures in inches). If in doubt, ask a grown-up to help you find the millimeters.
Nausea and vomiting are very nonspecific symptoms that can be common among people with stomach cancer. Persistent nausea and/or vomiting needs to be checked by your doctor. It can indicate a serious health problem and can cause damage to the lining of your esophagus.
Numerous bacteria, viruses, and parasites cause diseases in the intestines that result in diarrhea, dysentery, constipation or perianal irritation. They may also cause nausea, vomiting, and abdominal cramping. If the infection is in the small intestine, symptoms include watery diarrhea and vomiting. Infections in the large intestine can cause diarrhea and can result in an invasive and inflammatory disease called dysentery (small fecal volume with mucus and blood) (Table SI-1). Table SI-1.